suprēˈmum noun (mathematics)

The least upper bound (cf infimum; abbrev sup)

Supreme Being noun

1. A superior deity
2. God

Supreme Court noun

1. In the USA, the highest Federal court having jurisdiction over all lower courts
2. Elsewhere, the highest court of a nation or state
3. In England and Wales, a court consisting of the Crown Court, High Court and Court of Appeal (in full Supreme Court of Judicature)

supreme sacrifice noun

The giving up of one's life

Supreme Soviet noun

The legislature of the former USSR, consisting of two bodies, the Council of the Union, in which each deputy represented so many of the population, and the Council of Nationalities, in which each deputy represented one of the Republics or other distinct regions within the USSR